Glass-press.



No. 708,326. y P.y Esame. GLASS PRESS.

(Application led Aug. 27, 1901.)

Patented Sept." 2 |902.

` Y 4 INVENR- /L/. /fw l l Patented Sept. 2, |902. P. EBELING. GLASS PRESS.

I'Application filed Aug. 27, 1901.)

2 Sheets-Shee 2.

(No Model.)

| NVENTD R;

WAITN ESSES.

THE NDRRIS PETERS C0 FNCWD-LITHOv4 WASHINGTON, D. C

llnrTnn @Tarts FATTNT Omtrent PIIILLIP EBELING, OF MOUNDSVILLE, WEST VIRGINIA, ASSIGNOR OF ONF- IIAIJF TO GEORGE LAFAYETTE OALDVELL, OF VEIJLSBURG, l/VEST VIR- GINIA.

SPECIFICATION forming part of Letters Patent No. 708,326, dated September 2, 1902.

Application filed August 27, 1901. Serial No. 73,456. (No model.)

To @ZZ whom, t may concern: Y

Beit known that I, PHILLIP EBELING, a citizen of the UnitedStates, residing at Moundsville, in the county of Marshall and State of WestVirginia, have invented certain new and useful Improvements in Glass-Presses, of

which the following `is a specification, reference being had therein to the accompanying drawings.

1o In Letters Patent No. 668,910, granted to me February 26, 1901, I show and describe apparatus for shaping glassware, wherein the pressing-plunger is capable of a yielding or compensating movement for the purpose of avoiding excessive pressure lwhen too much glass has been placed in the mold. This compensation is obtained through the mediumof a coiled spring. While advantageous results have been secured from this mechanism, the

zo same is open to the objection that the resistance of the spring varies with its compression, the resistance `increasing as the spring contracts. It is highly desirable that the resistance of theA compensating mechanism z 5 should be unvarying. I-Ience it becomes the primary object of the present invention to provide a compensating device of uniform resistance.

A further object of the invention is to utilgo ize the compressed air, steam, or other pressactuating iiuid in effecting the desired uniform resistance of the compensating mechanism and to adjustably control the action ofv the fluid in such manner as to either increase or diminish the resistance, determined by the exigencies of the work.

A further object is to provide improved mechanism for controlling the exhaust of the actuating `fluid, whereby a gradual downward 4o movement of the plunger may be effected during the first part of its pressing stroke, thereby preventinginjury to the mechanism and to the glass.

Further objects of the invention are to provide improved means for actuating the moldcarrier and for controlling the movement thereof and for raising the pressed ware from the molds to facilitate removal thereof.

The invention consists in the novel features 5o of construction and in the combination and tion.

arrangement of parts hereinafter fully described and claimed, and illustrated by the accompanying drawings, wherein- Figure lis a view, partly in elevation and partly in verticalsection, of glass-pressing mechanism embodying my improvements. Figs. 2 and 3 are elevations of the power-cylinder and exhaust mechanism, taken from different sides thereof and shown partly in secrier-securing mechanism, together with a portion of the carrier. Fig. 5 is a vertical sectional view of the improved exhaust. Fig. 6 is a sectional plan view of the exhaust, taken through ports 35. Fig. 7 is a vertical sec- 65 tional view of the upper portion of the powercylinder and the piston operative therein. Fig. 8 is a side view of the mechanism shown in Fig. 4, with the carrier-securing latch in unlocking adjustment. 7o

Referring to the drawings, 2 represents a cylindrical column mounted on base 3, the latter being provided with floor-wheels 4, whereby the apparatus may be conveniently moved from place to place. In the present embodiment of the invention I propose to use compressed air as a motive fluid and to utilize column 2 as a reservoir therefor, the same being supplied through pipe 5 from a compresser. (Not shown.) 8o

Secured to the upper portion of column 2 is the power-cylinder 6, provided with valveeasing 7. Ports S, leading from opposite ends thereof, are connected alternately with the exhaust 9 by piston-valve l0, having its pe- 85 riphery recessed at IO to afford such connection. Air is passed from column 2 to the valve-casing through pipe 1I, and said casing is formed with the oppositely-extending ports I2 for passing the air to opposite ends of valve 10and the interior of the latter is also open for the free passage therethrough of air, so that the latter always has free and unobstructed passage to the uncovered port S. Stem I3 projects from the valve and is actu- 95 ated in manner presently to be explained.

Within cylinder 6 is the main piston I4, which is downwardly recessed from its upper end to receive the auxiliary piston I5, which has limited movement therein. Depending roo Fig. 4 is a plan view of the mold-ear- 6o from piston 14 is tubular stem 16, which carl ries the adjustable spring-plate 17 and incloses rod 18, secured at its upper end to auxiliary piston 15 and at its lower end carrying pressing-plunger 19. Piston-head 14 is formed with a ground-seat 20, having small ports 21 formed therein, communicating with space 22 overpiston 15. A threaded nib 23 projects centrally from seat 20, and vertically adjustable thereon is valve 24, secured to the lower end of stem 25, the latter being provided at its upper end with operating-wheel 25. By this means admission of air to space 2 is controlled. Carried by stem 25 is laterally-extending arm 26, and adjustably secured thereto is rod 27, which extends downward through one end of lever28, here shown fulcrumed between its ends to the under side of cylinder 6. The opposite end of this lever is adjustably secured to valve-stem 13 by stops 13'. Secured on rod 27 are stops 29 and 29. It will be understood that stem 25 travels with the main piston 14, so that rod 27 is moved vertically in unison with the piston, and as the latter approaches the downward limit of its stroke stop 29 engages and turns lever 28 in such manner as to reverse valve 10, and a similar operation occurs, vonly that the valve is moved in a reverse direction, as stop 29' engages lever 28 as the piston approaches the upward limit of its stroke. Arm

26 is secured to stem 25 by adjustable stops 26, the stem being adapted to turn in the arm for adjusting valve 24.

In the operation of pressing if it is desired that plunger 19 shall exert a maximum pressure valve 24 is open quite wide to permit free ingress of air into space 22 above piston l5. Thus the inner or auxiliary piston will be subjected to the same air-pressure as the main piston and at approximately the same time; but even in this adjustment the total pressure upon piston 15 will be less than that upon piston 14, owing to the difference in areas. Thus it will be seen that even with valve 24 open the pressing-plunger will have a yielding or compensating action upon the main actuating-piston and that in consequence thereof the plunger will have an upwardly-yielding pressing stroke. If, on the other hand, it is desired to still further reduce the resistance of the pressing-plunger, valve 24 is adjusted toward its seat, thereby correspondingly contracting the air-passage to space 22, with the piston 15 and the plunger carried thereby subjected to only a fraction of the working pressure. With the working pressure maintained, say, at one hundred 'pounds valve 24 may be so adjusted as to cause piston 15 to exert the same resistance in succeeding operations, with the degree of resistance determined by the requirements of the work in hand. Thus under a given adjustment of valve 24 the pressing-plunger will always be subjected to the same pressure, with the total length of stroke in cach operation of the machine determined by the quantity of glass in the mold. If the right amount .has been placed therein, a full or maximum stroke will be had, whereas if there is an excess of glass the pressing-plunger will stop somewhat short of its maximum stroke.

In all cases and regardless of the amount of glass the main piston 14 will make a full or maximum stroke, the difference therebetween and the stroke of piston 15 being compensated for by the downward movement of the main piston over piston 15. With the pressingplunger automatically adjustable, as described, and under less pressure than the mold-holding spring-plate it will be understood that there is no tendency to crowd the glass from the mold or to cause the moldsections to spring apart, as when pressing in a sectional mold, The downward or pressing stroke is effected so quickly by the impact of the motive iiuid against cylinder-head 14 that under ordinary working conditions the pressure in space 22 on piston 15, determined by the position of Valve 24, does not vary substantially during said stroke. If, however, it is desired to create an ascending or increasing pressure on piston 15 during the pressing stroke, and thereby effect a more gradual flow of glass in the mold, the same may be accomplished by retarding the exhaust from beneath piston 14 in manner presently to be explained, thus causing piston 14 to descend more slowly and affording time for a perceptible increase of pressure on piston 15.` Under such conditions valve 24 would be opened very little, so that at the beginning the pressure on piston 15 would be comparatively low.

It is desirable that the downward stroke of the main piston should be checked until spring-plate 17 reaches the mold-ring to prevent concussion and injury to the mechanism incident to a sudden and powerful downward stroke. To accomplish this, l connect cylinder-exhaust 9 with a vertically-disposed pipe 30, formed intermediate its ends with the main exhaust-port 31. 30 and vertically movable thereon is sleeve 32, held normally raised and covering port 31 by spiral spring 33. Extending from sleeve 32 is arm 34, which projects in the path oi the verticallyunoving rod 27 and is engaged and depressed by stop 27 on the latter. The arrangement is such that port 31 is uncovered during the downward stroke at about the time spring-plate 17 reaches the mold, thus removing all resistance from the under side of piston 14 and permittingit to respond to the full force of the working pressure. A partial exhaust is of course necessary for the preliminary portion of the downward stroke, and this is had through the small ports 35 in the upper portion of pipe 30. Arranged on said pipe in the plane of ports 35 is ring 36, formed with openings 36', adapted to register with ports 35, so that by turning the ring a greater or less number ot' said ports may be Closely tting pipeV IOO IlO

opened and the preliminary exhaust thereby increased or diminished, thus determining the speed of the pressing-stroke ofthe plunger, as above explained.

Vhile the apparatusis here shown and described in connection with the use of compressed air, it will be understood that steam or other motive fluid may be employed.

Elevated ou base 3 is a horizontal frame 37, which forms a support for the horizontallyrevoluble mold-carrier 3S, having secured to the under side thereof the large circular gear 39. Meshing with this gear is pinion 40 on shaft 4l, extending from air-motor 4Q, the latter being of any desired construction. Air is supplied from column 2 to the motor through pipe 43, and interposed in the latter is valve 44,of any preferred construction, having its spring-actuated lever arranged horizontally adjacent the vertically-moving latch 46 for securing the carrier. The upper face of the latter is formed with the inclined depressions 38, which the inner end of latch 46 is adapted to enter successively and hold the carrier iixed with the successive molds in operative position. The inner end of latch 46 is held normally depressed by spring 46. In operation when it is desired to advance the carrier the operator depresses the latch 46 and by means of i lateral projection 47 thereof overhanging valve-lever 45 the latter is also depressed, the valve opened, and air admitted to motor 42, thereby actuating shaft 4I and advancing the carrier. As soon as the carrier starts the operator releases latch 46, permitting the inner end thereof to ride on the edge of the carrier, as shown in Fig. S, where it remains until the next inclined notch 38Amoves thereunder, `when the latch drops thereinto and the spring-actuated valvelever 45 permitted to rise, shutting off the air. The carrier is thus secured with the mold in exact position for pressing.

The vertically-movable bottom 48 of each mold 49 is arranged on the upper end of a` pinO, having a roller 50f on the lower end thereof bearin g on the inclined circular track 5l, whereby as the molds move from pressing position the bottoms 48 thereof are gradually lifted, carrying therewith the pressed articles, which may be easily removed. Before the molds again come to pressing position pins 50 drop off the elevated end 5l of the track, as will be understood.

Having thus fully described myinvention, what I claim as new, and desire to secure by Letters Patent, isu

1. In apparatus ufor pressing glassware, a mold, a spring-plate, a spring-plate carrier and a pressing-plunger capable of independent movement, plate-carrier-actuating means, and means for subjecting the plunger to force or pressure substantially uniform throughout the pressing stroke and of less degreethan that applied to the spring-plate carrier.

2. In apparatus for pressing glassware, a cylinder, a hollow main piston, a spring-plate carried thereby, an auxiliary piston movable in the main piston, a pressing-plunger carried by the auxiliary piston, the main-piston chamber being provided with a duid-inlet over the auxiliary piston, and a mold.

3. In apparatus for pressing glassware, a cylinder, a hollow main piston provided With a fluid-inlet, a tubular stem extending from said piston, a spring-plate carried by the stem, an auxiliary piston movable in the main piston, a stem extending from the auxiliary piston through the tubular stem of the main piston,a plunger on the auxiliary-piston stem, and a mold. f

4. In apparatus for pressing..glassware, a mold, a pressing-plunger, plunger-actuating mechanism, means for regulating the force or pressure of the actuating mechanism on the plunger during the pressing stroke, and means for accelerating the movement of the plunger during the latter part of its pressing stroke.

5. In apparatus for pressing glassware, a mold-carrier, a motor therefor, a motor-controlling device, and carrier-securing mechanism adapted to actuate said device.

G. In apparatus for pressing glassware, a mold-carrier, a motor therefor, a motor-controlling valve, and carrier-securing means adapted when released from the carrier to hold the valve open.

7. In apparatus for pressing glassware, a mold-carrier, a motor therefor, a motor-coni trolling valve,a spring-actuated latch adapted normally to lock the carrier, and an operative connection between the latch and valve,

ICO

whereby when the carrier isreleased the 105,

valve is opened. r..

8. In apparatus for pressing glassware, hollo-W column forming an air-reservoinpres'sl ing mechanism including a power cylinder communicating With the column, a moldv11o carrier, and a carrier-actuating air-motor communicating with the column. l

9. In apparatus for pressing glassware, a hollow column forming an airreservoir,press ing mechanism, a mold-carrier, a latch normally engaging and securing the carrier, an air-motor for actuating the carrier, a pipe extending from the column to the motor, and a valve in the pipe adapted to be opened by the latch when the latter is released from the carrier.

In testimony whereof I afx my signature in presence of `two Witnesses.

IHILLII) BBELING.

IZO

Witnesses:

C. B. Ron, CHAs. L. II'ALL. 

